I've noticed lately that my steering is a little funny at slow speeds (under 40kph). The steering seems to "locate" in the centre. You can actually feel something like a notch when the bars are dead centre. As you turn the bars, it requires a little bit extra pressure, then the steering goes nice and light again. Because there's less bar turn at higher speeds, it's not such an issue then.
It's most noticeable when the tyre's down a few psi. Back up to pressure, it's still there, but only just.
Can I assume this is a bearing issue or is this something more?